Global warming readiness: Feasibility of enhanced biological phosphorus removal at 35 °C

•EBPR works at 35 °C and requires no highly specialized PAO community.•Diverse and abundant Ca. Accumulibacter taxa are present.•Ca. Accumulibacter showed higher P cycling activity at 35 °C than at 30 °C.•Increased influent TOC/PO43−-P ratio benefited the proliferation of PAOs.•Cluster III Defluviic...

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Published in:Water research (Oxford) 2022-06, Vol.216, p.118301-118301, Article 118301
Main Authors: Qiu, Guanglei, Law, Yingyu, Zuniga-Montanez, Rogelio, Deng, Xuhan, Lu, Yang, Roy, Samarpita, Thi, Sara Swa, Hoon, Hui Yi, Nguyen, Thi Quynh Ngoc, Eganathan, Kaliyamoorthy, Liu, Xianghui, Nielsen, Per H., Williams, Rohan B.H., Wuertz, Stefan
Format: Article
Language:English
Subjects:
Betaproteobacteria - metabolism
Bioreactors
Ca. Accumulibacter
Carbon
Carbon source
Enhanced biological phosphorus removal
Feasibility Studies
Global Warming
Glycogen - metabolism
Glycogen accumulating organisms
In Situ Hybridization, Fluorescence
Phosphorus - metabolism
Polyphosphate accumulating organisms
Polyphosphates - metabolism
RNA, Ribosomal, 16S - genetics
RNA, Ribosomal, 16S - metabolism
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Summary:•EBPR works at 35 °C and requires no highly specialized PAO community.•Diverse and abundant Ca. Accumulibacter taxa are present.•Ca. Accumulibacter showed higher P cycling activity at 35 °C than at 30 °C.•Increased influent TOC/PO43−-P ratio benefited the proliferation of PAOs.•Cluster III Defluviicoccus effectively survived slow-feeding condition. Recent research has shown enhanced biological phosphorus removal (EBPR) from municipal wastewater at warmer temperatures around 30 °C to be achievable in both laboratory-scale reactors and full-scale treatment plants. In the context of a changing climate, the feasibility of EBPR at even higher temperatures is of interest. We operated two lab-scale EBPR sequencing batch reactors for > 300 days at 30 °C and 35 °C, respectively, and followed the dynamics of the communities of polyphosphate accumulating organisms (PAOs) and competing glycogen accumulating organisms (GAOs) using a combination of 16S rRNA gene metabarcoding, quantitative PCR and fluorescence in situ hybridization analyses. Stable and nearly complete phosphorus (P) removal was achieved at 30 °C; similarly, long term P removal was stable at 35 °C with effluent PO43-_P concentrations
ISSN:0043-1354
1879-2448
DOI:10.1016/j.watres.2022.118301